About half of the genes that influence how well a child can read also play a role in their math ....

"Professor Robert Plomin (King’s College London), who leads the TEDS study, and one of the senior authors, said: “This is the first time we estimate genetic influence on learning ability using DNA alone. The study does not point to specific genes linked to literacy or numeracy, but rather suggests that genetic influence on complex traits, like learning abilities, and common disorders, like learning disabilities, is caused by many genes of very small effect size. The study also confirms findings from previous twin studies that genetic differences among children account for most of the differences between children in how easily they learn to read and to do maths. Children differ genetically in how easy or difficult they find learning, and we need to recognise, and respect, these individual differences. Finding such strong genetic influence does not mean that there is nothing we can do if a child finds learning difficult–heritability does not imply that anything is set in stone–it just means it may take more effort from parents, schools and teachers to bring the child up to speed.”

"During Medieval England the upper-classes reproduced at a 2:1 rate over the lower classes, which resulted in a downward drift of people and their genes and which might explain the general decline in violence and the increase in average IQ. Other researchers have found similar phenomena in other European countries

INSTEAD IN 'Murica we get the 85 IQ and below populace reproducing at a rate of 4:1 over those successful Americans...........